Maybe the examiner actually is a machine? Or else how can the examination board fail to notice that the failed examiner is a biological entity, with human DNA to boot, and not a machine? And anyway the Turing test is a thought experiment, it is not intended for practical applications.

@AlexP I'd like the examiner to be a human if possibile. Maybe the examination board believe the failed examiner to be lying so blatantly that they not even bother trying biological tests?

Are you talking about an AI or an artificial lifeform? In the former case, "cut me and I'll bleed" is a pretty compelling argument that I'm the human.

I imagine it would be hard for a full-blooded, suave, and all-around charismatic human to switch roles. It's like a criminal going into a court room and saying "No, I'm a jury member! That one over there is the criminal!" and having everyone agree. Unless... D&D diplomacy is real: youtu.be/6F74mBRjwTc

What is the last digit of pi?

Based on conversations I've had with customer service call centres or the returns desk, or reading the comments sections on may blogs, I'd almost have to say a large number of people could not pass the Turing Test today....

Unfortunately, popular portayals of Turing's test don't do full justice to the original.

watch (this movie )en.wikipedia.org/wiki/Ex_Machina_(film)

I have a fe friends who at least from time to time would definitely fail the turing test.

I had a colleague once, you should be pretty skilled at anything to prove any signs of intelligence from him.

It happens - newscientist.com/blogs/shortsharpscience/2009/03/…

You've probably failed a Completely Automatated Public Turing test to tell Computers and Humans Apart yourself.

The OP is actually a machine, in case nobody noticed.

Isn't the answer completely obvious to anyone who's read about what Turing tests actually are?

As someone already has quoted xkcd, here's Dilbert: dilbert.com/strip/2008-03-30

You might be thinking of the Voight-Kampff Machine from Blade Runner.

Sure, I'd love to go out for a Turing Test, how about tonight?

@user6760 I ran out of precision whilst approximating it, and the recursive solution is infinite (I always make sure to sanity-check these before I calculate them because unsanitised user input should be considered evil), so I conclude that there is no solution. You sick troll - trying to get young AI just developing their natural language processing routines stuck in infinite loops. You aught to be ashamed of yourself. Hopefully they have proper malloc testing and won't just segfault without saving state...

"Can a human fail a Turing test?" Go over to Stack Overflow and sort questions by New. You tell me.

"Talking to an NPC again"

"Can a human fail a Turing test?" - Well, what do you think happens if the machine wins?

I would love a story where the machine not only convinces the others, but eventually (after some time in the lab) the human starts to doubt his own humanity.

Why not replace Arthur's brain with an electronic one? You'd just have to programme it to say "What?" and "I don't understand" and "Where's the tea?" Who'd know the difference?